Explains
How do touchscreens work? And why gloves don't work
A phone touchscreen finds your finger by electricity, not pressure. Under the glass is a grid of see-through wires, and an electric signa...
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Biology
Why don't antibiotics work on viruses? Bacteria vs viruses
Antibiotics don't work on viruses because they attack parts that only bacteria have, such as the bacterial cell wall. A virus has no c...
System Design
Database Migrations Explained: Change a Live Database Safely
A database migration is a small, numbered file that changes a database's structure, such as adding a column, and is kept in the code r...